Damper mechanism for gas-stoves



T. A. SOULTS.

I DAMPER MECHANISM FOR GAS STOVES.

APPLICATION FILED DEC. 14. 1916.

1,330,989. M Patented Feb, 17,1920.

2 SHEETS-SHEET X.

wz'fiaeases MENTOR Zia A TTOBNE r5 v T. A. SOULTS. DAMPER MECHANISM FOR GAS STOVES.

APPLICATION FILED DEC. 14. l9i6.

llzomms l f gom J 5 C 2 SHEET$SHEEI 2.

Mrmusrs Patented Feb. 17, 1920.

. declare the-following to be nor of carryin THOMAS A. SOULTS, OF ROCHESTER, NEW ROCHESTER, NEW YORK, A

YORK, ASSIGNOR TO SILL STOVE WORKS, OF CORPORATION OF NEW YORK.

DAMPER MECHANISM FOR GAS-STOVES.

' Application filed December v To all whom it may concern:

Be it known that I, THOMAS A. SoULTs, of Rochester, in the county of Monroe and State of vNew York, have invented certain new and useful Improvements in Damper Mechanism for Gas-Stoves; and I do hereby a full, clear, and exact description of the same, reference being had to the accompanying drawings, orming apart of this specification, and to the reference-numerals marked thereon.

My invention has for its purpose to provide a damper mechanism for gas stoves and gas-ranges of the type which are connected with an outlet flue or chimney for carrying ofl' smoke and products of combustion, the parts being related in such a manner as to effectively prevent accidental extinguishing of the gas flame from a sudden back draft or'accumulation of back pressure from the flue. A further purpose of my improvement is to carry off the products of combustion, smoke and unburned gases into the flue under ordinary operating conditions when a draft is acting properly, and also to permit a ready outlet from the flue of any gases or air currents that may be driven down the flue by a reversed draft, thus preventing their having access to the flame or fire. To these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the ends of the specification.

In the drawings:

Figure l is a plan view, with parts broken away, of a combination coal and gas stove embodying a preferred arrangement of my invention;

Fig. 2 is a sectional view on line 2 a of Fig. 1

Fig. 3 is a sectional view on line 3"3 of Fig. 1; and

Fig. 4 is a sectional view on line 4=4 of Fi' 1.

imilar'reference numerals in the several figures indicate the .same parts.

The structure which I am about to describe is intended merely as illustrative of one manout the invention, which is applicable in ifi'erent relations, whether it be to a gas stove or gas range simply, or to a combination structure invo ving both a-coal burning section and gas burning section, and

, Specification of Letters Patent.

Patented Feb.

17, 1920. 14, 1916. Serial No. 136,905.

in its broad conception may be said to in clude a secondary outlet or flue which is associated with the gas stove or gas burning section and also with the main outlet or flue for carrying ofl" unburned gases and products, wh1le at the same time having a permanent o ening or outlet to the atmosphere imme iately surrounding the stove. he opening or outlet last mentioned is under normal conditions Without function, and serves its purpose only when a back draft or reverse current is present in the flue and is diverted from its otherwise natural course to the fire, and exhausted outwardly through said opening into the room or chamber containing the stove. In the majority of instances, strong back drafts occur only for a moment or so, but continue for a suificient length of time, not infrequently, and with enough pressure to extinguish a gas flame, and as this usually occurs without warning or notice of any sort, disastrous results usually follow from the accumulation of escaping gas in the stove or room.

In the present structure, main body or structure of the stove while 2 is an oven which may be heated from the as burner 3 or from the heat of coal in the re box 4 when coal is burned on the grate 6 designates the main fine or outlet which may be connected in the usual manner with the coal burning section of the stove for carrying off smoke and products of combustion, while 7 designates a secondary flue that is in communication with the main flue 6 through an opening 8. The secondary flue 7 communicates with the oven 2 through the in F ig.-3. The opening 11 is preferably controlled by a damper 12, which is also operatively connected to a damper 13 governing the burner chamber 14 and preferably connected with the gas cook that when the latter is opened to furnish a supply of fuel, the dampers or valves 12 and 13 are simultaneously opened to establish communication between the gas burner 3 and the secondary flue 7. v Burners 15 are also arran ed at the upper part of the stove in a chamber 16 which is in direct communication with the secondary flue 7, as shown in Fig. 3. The secondary flue 7 indicated by 17 ,aflording an outlet to the atmosphere surrounding the stove, and it 1 designate the ue 9 and openings 10 and 11, as indicated is open at one end, as

will be observed that the outlet 17 is dismerely pass out through the to find their way back to the burners,

posed oppositely to the opening 8 communieatin with the main flue 6, and is thus" in the dlrect path of any back draft or reverse "current that may be induced in the secondary flue 7 18 designates a damper controlled by the handle 19 and operating to close the opening 8 if desirable for any reason, as for instance when starting a. coal fire when the chimney is cold or other conditions make 'it expedient b reason of im rfect draft. As soon as tlie proper com ustion and draft is obtained in the coal sec- .tion of the stove, there is no further need for maintaining the damper 18 closed, and when it is desirable to use the gas burning sectionof the stove, the damper 18 is opened in order to afford access into the main flue for the products of combustion from the gas burners. In the event of any back draft occurring and reaching the secondary flue 7, it naturally follows the most direct course and is exhausted through the opening 17 into the atmosphere, and thus prevented from reaching the burners of the stove and affecting the gas flame. In the event that the damper 18 is left closed while the gas burners are in operation, no serious harm can result, as the products ofv combustion opening 17 into the surroundin atmosphere, and under any condition, whet er the gas secondary flue is in communication with themain flue or not, it is impossible for any air currents or draft which therefore cannot be accidentally extinguished.

While I have referred particularly to gas stoves and gas burners, I intend to cover by this application, all uses of my invention as applied to any gaseous or liquid fuel burners, and it will be understood that the claims are to be construed as covering any such gaseous or liquid fuel stove. i

- phere surrounding I claim as my invention:

1. In a gas stove, the combination of a burner chamber, a main flue, a secondary flue communicating with said main flue and with said burner chamber and having an opening communicating with the atmosphere surrounding the flue, and a damper for closing the opening communicating with the main flue without obstructing the opening communicating with the atmosphere.

2. In a gas stove, the combination of a burner chamber, a main flue, a secondary flue communicating with said main flue and with said burner chamber and having an opening communicating with the atmosthe flue, and a damper opening'into the main flue and movable to close the opening from the secondary flue to the main opening in the secondary flue communicating with the atmosphere;

3. In a stove, the combination of upper and lower burner chambers, a main flue, a

flue without obstructing the secondary flue having openlngs communieating with said main flue, said upper and lower burner chambers and open to the atmosphere surrounding-the flue, a damper for closing the opening communicating with the lower burner chamber and a second damper movable to open and close the opening between the main and secondary flues.

4. In a stove, the combination of upper and lower burner chambers, a main flue, a secondary flue having 0 enings communicating with said main lower burner chambers and open to the atmosphere surrounding the flue, dampers controlling cape of the products of combustion from said lower chamber, and means controlling the opening between the main and secondary ue, said upper and the admission of air to and es- 

